In this photo taken Monday, Nov. 30, 2009, Rob Esterlein, deputy executive director of the Admiral Nimitz Foundation, stands next to a 40-ton, 76-foot-long Japanese mini-sub, one of five such vessels used in the attack on Pearl Harbor 68 years ago, at the National Museum of the Pacific War in Fredericksburg, Texas. The museum, which has undergone a $15.5 million expansion, will reopen Monday, Dec. 7, 2009. AP Photo/Eric Gay.

By: Michael Graczyk, Associated Press Writer

FREDERICKSBURG, TX (AP).- Former President George H.W. Bush is helping dedicate a $15.5 million gallery expansion that carries his name at the National Museum of the Pacific War in Texas.

Bush is expected at the museum in Fredericksburg on Monday, the 68th anniversary of the Pearl Harbor attacks. Bush was a World War II naval aviator and survived being shot down by the Japanese over the Pacific.

The museum expansion has been planned for about a decade. It takes visitors on a chronological journey using multimedia and has thousands of artifacts, including one of two existing Japanese mini-submarines used on Pearl Harbor.

It's managed by the Nimitz Foundation, named for Fredericksburg native Adm. Chester Nimitz. He commanded American naval forces in the Pacific during the war.